Yu, Yan, compiler
Karez
Intercontinental Press, 2008
 Buku Teks
Ikeda, Daisaku, 1928-
Rendezvous with nature
Daisaku, 1990
 Buku Referensi
Maritain, Jacques
Philosophy of nature
Philosophical Library, 1951
 Buku Teks SO
Koren, Henry J.
An introduction to the philosophy of nature
Duquesne University, 1960
 Buku Teks SO
Diah Sulistiarini
Keanekaragaman flora anggrek (orchidaceae) di cagar alam gunung simoang, Jawa Barat = Floristic study on the orchids orchidaceae found in gunung simpang nature reserve, West Java
Pusat Penelitian Biologi, 2009
 Artikel Jurnal